Markets may do something useful about oil/gas depletion, they may do things that are counterproductive. Markets, in Keynes' phrase 'Ape unreason proleptically' so who knows what they'll do.
My problem isn't with the idea that markets might have a useful contribution to make, they may; it's with anyone that appears to suggest, that markets are in and of themselves, reliably and certainly
the answer to the problem of depletion, where the resource being depleted plays such a fundamental role in the functioning of our societies.
It takes ten units of oil energy to put one unit of food energy on UK tables. This isn't just about people driving slightly smaller cars.
I have a big problem with any doctrine that makes light of the fundamental questions raised by oil/gas depletion or suggests that it'll be solved by some form of continuing business as usual.
I don't read nano's contributions as suggesting that there is no problem because markets are a universal panacea, but his very passionate defence of markets in this context does tend to drag this discussion in that direction.
I think some more fundamental approaches may be required, and some of those would significantly benefit from public policy support. For example, fundamental structural adjustments are needed, I suspect, for agriculture to do its job in a world of depleted oil. These adjustments would tend to involve radical decentralisation of our food systems, bringing grower and consumer physically closer to reduce fuel costs. They also involve moving away from input-based agriculture towards one that recycles nutrients, especially Phosphorous.
These changes are at present ones that the agri-chem commercial interests and their representatives in government are likely to passionately oppose. Can you imagine for example, Science minister Lord Sainsbury giving his wholehearted support to a food security policy that takes us away from massively centralised supermarket chains (like the ones that made him a billionaire?) Or can you imagine what the very influential oil and chemical giants would make of an approach to nutrient managment that was largely decentralised and not profitable for them, despite being more sustainable?
Take a look at some of the policy changes implied by the following
article (warning, pdf file) and see how you think a market largely optimised for maximally profitable laws & political decisions (i.e. the UK political system) would react to it, given free play of 'market forces' as they apply to such a system in our times.